631900379 has 4 divisors (see below), whose sum is σ = 689345880. Its totient is φ = 574454880.

The previous prime is 631900361. The next prime is 631900391. The reversal of 631900379 is 973009136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 631900379 - 2⁸ = 631900123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631900279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28722734 + ... + 28722755.

It is an arithmetic number, because the mean of its divisors is an integer number (172336470).

Almost surely, 2^631900379 is an apocalyptic number.

631900379 is a deficient number, since it is larger than the sum of its proper divisors (57445501).

631900379 is a wasteful number, since it uses less digits than its factorization.

631900379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57445500.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 631900379 is about 25137.6287465624. The cubic root of 631900379 is about 858.1229925491.

The spelling of 631900379 in words is "six hundred thirty-one million, nine hundred thousand, three hundred seventy-nine".